我如何在没有表单的情况下捕获屏幕?
本文关键字:情况下 屏幕 表单 | 更新日期: 2023-09-27 18:15:30
这是一个类,我用来捕捉我的屏幕和鼠标光标作为截图。但是我想做的是,如果窗体在屏幕中间,不要捕获它捕获屏幕和窗体后面的区域,而不是窗体本身。
即使表单在前面,当应用程序运行时,我点击按钮或更改表单中的某些内容,也不要捕获它,只捕获屏幕上表单后面的区域,就像表单不存在一样。
using System;
using System.Runtime.InteropServices;
using System.Drawing;
using System.Drawing.Imaging;
using System.Windows.Forms;
namespace ScreenShotDemo
{
public class ScreenCapture
{
[StructLayout(LayoutKind.Sequential)]
struct CURSORINFO
{
public Int32 cbSize;
public Int32 flags;
public IntPtr hCursor;
public POINTAPI ptScreenPos;
}
[StructLayout(LayoutKind.Sequential)]
struct POINTAPI
{
public int x;
public int y;
}
[DllImport("user32.dll")]
static extern bool GetCursorInfo(out CURSORINFO pci);
[DllImport("user32.dll")]
static extern bool DrawIcon(IntPtr hDC, int X, int Y, IntPtr hIcon);
const Int32 CURSOR_SHOWING = 0x00000001;
public static Bitmap CaptureScreen(bool CaptureMouse)
{
Bitmap result = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, PixelFormat.Format32bppArgb);
try
{
using (Graphics g = Graphics.FromImage(result))
{
g.CopyFromScreen(0, 0, 0, 0, Screen.PrimaryScreen.Bounds.Size, CopyPixelOperation.SourceCopy);
if (CaptureMouse)
{
CURSORINFO pci;
pci.cbSize = System.Runtime.InteropServices.Marshal.SizeOf(typeof(CURSORINFO));
if (GetCursorInfo(out pci))
{
if (pci.flags == CURSOR_SHOWING)
{
DrawIcon(g.GetHdc(), pci.ptScreenPos.x, pci.ptScreenPos.y, pci.hCursor);
g.ReleaseHdc();
}
}
}
}
}
catch
{
result = null;
}
return result;
}
}
我的意思是,当它运行时,我将看到表单,我将能够改变点击按钮的东西,但捕获的截图,如果我将用油漆编辑它,我将看不到表单。
这是在Form1中我是如何捕获的:
private void StartRecording_Click(object sender, EventArgs e)
{
timer1.Enabled = true;
}
和timer1滴答事件:
private void timer1_Tick(object sender, EventArgs e)
{
using (bitmap = (Bitmap)ScreenCapture.CaptureScreen(true))
{
ffmp.PushFrame(bitmap);
}
}
使用(bitmap = (bitmap)ScreenCapture.CaptureScreen(true))
嗯…隐藏表单?
this.Visible = false;
,然后运行截图方法
:
protected Bitmap TakeScreenshot(bool cursor)
{
Bitmap bitmap;
this.Visible = false;
bitmap = CaptureScreen(cursor);
this.Visible = true;
return bitmap;
}
并在你的代码中按你想要的方式使用它:
private void timer1_Tick(object sender, EventArgs e)
{
using (bitmap = (Bitmap)ScreenCapture.TakeScreenshot(true))
{
ffmp.PushFrame(bitmap);
}
}